Is it the dealer opinion the elements are broken? Worth checking fuses, relay and take a look under the seats to ensure there are no lose connections.
If you are handy put a meter accross the feeds to the heaters on the seats to ensure you are getting power 12v there, if not it probaly a 20 pence fuse gone or a few quid for a new relay.
Richard
If you are handy put a meter accross the feeds to the heaters on the seats to ensure you are getting power 12v there, if not it probaly a 20 pence fuse gone or a few quid for a new relay.
Richard